Comet 8P/Tuttle
Userterryjlovejoy
User`s nameTerry Lovejoy
Observation's time (UT)1981-01-04 12:00:00
Tool20cm Newtonian
Observation's placeShailer Park
Magnitude8:
Comparison stars sourceAE - Planetary magnitudes from the American Ephemeris and Nautical Almanac
Method
Coma diameter(')Not set
Tail's lengthNot set
Condensation4
Positional angle of tailNot set
Bortl's scaleNot set
Aperture20 cm
Focal length (mm)1200
Type of toolL - Newtonian reflector
Magnification60
Field of view (°)1.67
SQM-L in zenithNot set
Light pollution zoneYellow
LmNot set
CommentEasily visible. Although noted as 8pm, I believe it was later (waited for comet to get higher in sky)
Morris Format1981 Jan 4.5 UT: m1=8:, DC=4 ...20-cm L (60x) ...Terry Lovejoy (Shailer Park, Australia)